I had to get tested for about everything else it could be and then they still ruled it out cause I was getting stronger. A lot of people think it can be triggered by viral infections. I'd had glandular fever and it was probably just me recovering from that (takes months, had to carry second year exams into third year which was a nightmare). I'd listen to them when they say things you can change about diet and lifestyle first. It can take a while to get diagnosed, if you even have m.e.

By the fatigue clinic in royal free. I still debate the diagnoses but might now by fibromyalgia - which is basically the same thing. Lots of boring details but if you're seriously wanting to know stuff, PM me.

It's a bit have you tried turning it off and on again, but it's gobsmackingly amazing how many people don't realise that severe headaches are directely related to dehydration. Or if they do, do sod all about it and carry on wondering why they have bad headaches.